Sharpener for knives and other cutting tools



Dec. 1924- 1518,726

H. cs. BENNETT ET AL SHARPENER FOR KNIVES AND OTHER CUTTING TOOLS Filed May 7, 1923 (SW @M Patented Dec. 9, 1924.

1,518,726 PATENT OFFICE.

I HENRY GRAVILLE BENNETT AND IVO ROWE, OF SHEFFIELD, ENGLAND.

SI-IARPENER- FOR KNIVES AND OTHER CUTTING TOOLS.

Application filed May 7, 1923. Seriafl No. 637,110.

To all m 710m it may concern:

Be 1t known that we, HENRY GRAVIL E BENNETT and Ivo Rows, both of 41 Eyre I Lane, Sheffield, in the county of York, England, and both. subjects of the King of Great Britain and Ireland, have invented certain new and useful Improvements in Sharpeners for Knives and Other Cutting Tools, of which the following is a specifica tion.

vThis invention relates to sharpeners for knives and other cutting tools of the kind in which the cuttingedge is passed between two hardened steel or other members disposed in V fashion.

The object of this invention is to construct an improved tool of this type.

According to this invention a sharpener for knives and other tools having acutting edge-comprises a, holder and a plurality of blades positioned in said holder with all their extremities at one end attached to said holder by a common connector and the other extremities of alternate blades spaced apart and secured by common connectors to said holder, thereby collectively constituting a V like structure.

Referring to the drawings filed herewith Fig. 1 is an elevation of one form of knife sharpener made in accordance with this invention.

Fig. 2 is a plan.

Fig. 3 is a detail view showing one of the hardened sharpening members.

Fig. 4c is an end elevation of a modified form.

Fig. 5 is a detail view of a modified form of lug for securing the device to a base.

In Figs. 1 to 3, a holder a is formed with two cheeks Z), Z) forming a recess 0 and a flange 0 In the recess is secured a plurality of hardened steel blades cl, (1 fastened by rivets or pins 6, e or the like at three triangular points in the holder, one end of each blade being secured at an apical point, thereby forming a series of V shaped sharpening edges between which the knife is passed. The holder is formed with a gap to expose the Vs formed by the inner edges of the blades. To ensure a good sharpening efiect, an acute V is essential and to attain this, one hole 7 (Fig. 3) at one end of each blade is provided purposely out of line with the longitudinal axis of the blade, each such end being secured at the apical point of the V so, that the said apical point s disposed in the inside of theV formed by the longitudinal axes of the blades,

whereby the blades are connected eccentrically at the apical point to produce an acute V relatively to a predetermined width of the open ends of the V. g is a handle formed of a strip of metal folded on itself and embracing and secured to the holder 55 a by a pin it passing through the flange 0 and by the pin 6 on which the blades are mounted passing through the ends of the handle. The ends of the handle are bent to form lugs j by which the device is secured to a base 70 by screws m.

reasonable amount of play is produced which adds considerably to the sharpening efiect whilst readily permitting displacement of particles removed by sharpening. H

Fig. 4 shows a modified construction 'in whichthe blades d, cl are secure at the apical point centrally instead of eccentrically and by varying the length of the blades or the width of the open end of the V, or both, any desirable angle of V can be pro- 'duced.

In Fig. 5, a modified form of lug for securing the device to a base is illustrated,

lug, the handle 9 may be dispensed with if desired.

l/Vhat we claim and desire to secure by Letters Patent is 1. A sharpener for knives and other tools having a cutting edge, comprising a holder the sides of the holder, and each of said holder-sides having a V-shaped gap corresponding with said V-like structure.

2. A sharpener for knives and other tools having a cutting edge, comprising a holder,

and a plurality of blades associated with said holder to collectively constitute a V- like structure, one end of each of said blades The blades (LIZ being loosely mounted, a

being secured to said holder by a common connector and the opposite ends of alternate blades being spaced apart and secured by common connectors to said holder, said con-- nector 'at the apex of the V-like structure being eccentrically disposed relatively to the longitudinal centre line of each blade.

3. A sharpener for knives and other tools having a cutting edge, comprising a holder having spaced side members, and a plurality of blades associated with said holder between its sides to collectively constitute a V- like structure, one end of each of said blades being secured to said holder by a common connector, and the opposite ends of alternate blades being spaced apart and secured by common connectors to said holder, said blades being loosely mounted on said connectors, all the connectors being passed through the sides of the holder, and each of said holder-sides having a V-shaped gap complementary to said V-like structure.

4:. A sharpener for knives and other tools having a cutting edge, comprising a holder, and a plurality of blades positioned in said holder with all their extremities at one end attached to said holder by a common connector and the other extremities of alternate blades spaced apart and secured by common connectors to said holder, thereby collectively constituting a V-like structure, the

holder being formed with a gap to expose the VS formed by the inner edges of the blades, a handle formed of a strip of metal blades associated in the holder-loop to collectively constitute a V-likestructure, one end of each of said blades being connected to said holder by a common, headed pinmember, and the opposite ends of alternate blades being spaced apart and connected by common headed pin-members to said holder, all said blades being loosely mounted on said members which are all passed through the sides of the holder with their heads over lying and engagi1 1g such sides, and said holder-sides having a V-shaped gap complementary to said V-like structure.

In testimony whereof, we, aflix our signatures.

HENRY .GRAVILLE BENNETT. IVO ROWE. 

